There are four appellations for sweet wines, Vins Doux Naturels, in Languedoc. All of them employ one grape: Muscat à Petit Grains. The must is fortified with neutral grape spirit, leaving the finished wines with a minimum of 11% residual sugar and 15-18% alcohol by volume. The four AOCs are: Muscat de Saint Jean de Minervois, Muscat de Frontignan, Muscat de Mireval and Muscat de Lunel.